As a general rule...never accept the first offer. My history has been that the offers get better over time.
A couple of years ago I was paid $2600 and 3/16 per net acre in Beckham 36-11N-21W. You'll also want to learn about all the contractual items you are signing to. What layers are they leasing? Do they get to cost you (out of your share) for compression, transport, etc. How long is the lease, and do they have the right to automatically renew....it goes on and on.
Given the potential money involved, I'd hire a professional. For example, if you got the same deal I did, it would amount to over a half million more in bonus, plus more money if they drill and it's successful.